Write Joule’s law of heating.

### Answer

**Joule’s law of heating**

Heat produced in a resistor is

- directly proportional to the square of current for a given resistance,
- directly proportional to the resistance for a given current and
- directly proportional to the time for which the current flows through the resistor

H = I^{2}Rt

where,

- H = Heat produced
- I = current
- R = Resistance of the conductor
- t = Time for which the current flows through the resistor